JPS6119557B2 - - Google Patents
Info
- Publication number
- JPS6119557B2 JPS6119557B2 JP12513579A JP12513579A JPS6119557B2 JP S6119557 B2 JPS6119557 B2 JP S6119557B2 JP 12513579 A JP12513579 A JP 12513579A JP 12513579 A JP12513579 A JP 12513579A JP S6119557 B2 JPS6119557 B2 JP S6119557B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- base
- outer cylinder
- fixed
- inner cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004873 anchoring Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Jib Cranes (AREA)
Description
【発明の詳細な説明】
本発明は、外筒と内筒とによるクレーンを1本
のシリンダと2本の索条とにより、伸縮せしめる
ブーム伸縮装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a boom telescoping device that allows a crane consisting of an outer cylinder and an inner cylinder to be extended and retracted using one cylinder and two cables.
従来、クレーン車におけるクレーンには外筒内
に中筒が、該中筒内に内筒がそれぞれ摺動自在に
挿入され、その中筒及び内筒を出没させるように
したものである。そのクレーンにおいて、内筒は
中筒の先端に入力で固定するか、或いは多段式の
シリンダにより出没させるようにしているが、前
者のものでは、作業が極めて煩雑であり、しかも
内筒は中筒に対して最突出状態又は最没入状態の
いずれかであるため、クレーンの伸縮移動範囲は
中筒の外筒に対する出没範囲のみであり、極めて
狭いものであつた。また、後者のものでは、構造
が複雑で且つ重量が大きくなり、クレーン能力の
低下を来たすなどの問題があつた。 Conventionally, in a crane for a mobile crane, a middle cylinder is slidably inserted into an outer cylinder, and an inner cylinder is slidably inserted into the middle cylinder, so that the middle cylinder and the inner cylinder can be moved in and out. In these cranes, the inner cylinder is either fixed to the tip of the middle cylinder by input, or it is moved in and out using a multi-stage cylinder, but in the former case, the work is extremely complicated, and the inner cylinder is attached to the middle cylinder. Since the crane is in either the most protruded state or the most retracted state, the range of telescopic movement of the crane is limited to the range in which the middle cylinder moves in and out of the outer cylinder, which is extremely narrow. In addition, the latter type had problems such as a complicated structure and a large weight, resulting in a decrease in crane capacity.
本発明はかかる点に鑑みてなされたもので、1
本の単段式シリンダ2本の索条とを設け、一方の
索条を外筒若しくは中筒の基部に、他方の索条を
を外筒若しくは中筒の先端部に係合手段により選
択的係合固定し、該係合手段を両索条のいずれか
一方に常時係合させるようにしたことにより、中
筒及び内筒をそれぞれ外筒及び中筒より出没させ
る一方、内筒が投入した状態で中筒を外筒より出
没させるようにしたクレーン車のブーム伸縮装置
を提供するものである。 The present invention has been made in view of these points, and includes:
This single-stage cylinder is equipped with two cables, one cable is attached to the base of the outer cylinder or the middle cylinder, and the other cable is selectively attached to the tip of the outer cylinder or the middle cylinder by an engaging means. By fixing the engagement and making the engagement means always engage with either one of the cables, the inner tube can be moved in and out of the outer tube and the inner tube, respectively, while the inner tube can be inserted. To provide a boom extension/retraction device for a crane vehicle, in which an inner cylinder is made to protrude and retract from an outer cylinder in a state in which the inner cylinder is moved in and out of the outer cylinder.
以下、本発明の構成を実施例について図面に基
づいて説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.
第1図及至第4図に示すように、1はクレーン
車であつて、車台2の後部に基台3が旋回可能に
設けられ、基台3にはクレーン4が連設されると
共に、クレーン4の操作席5が設けられている。 As shown in FIGS. 1 to 4, reference numeral 1 is a crane truck, and a base 3 is rotatably provided at the rear of a chassis 2. A crane 4 is connected to the base 3. Four operation seats 5 are provided.
クレーン4は外筒6と、外筒6内に摺動自在に
挿入された中筒7内に摺動自在に挿入された内筒
8とよりなり、内部にブーム伸縮装置9が設けら
れている。外筒6はその基部が基台3に回動自在
に枢支されると共にに、中央部と基台3との間に
起伏シリンダ10が接続されている。 The crane 4 consists of an outer cylinder 6 and an inner cylinder 8 which is slidably inserted into an inner cylinder 7 which is slidably inserted into the outer cylinder 6, and a boom telescoping device 9 is provided inside. . The base of the outer cylinder 6 is rotatably supported by the base 3, and an undulating cylinder 10 is connected between the center and the base 3.
ブーム伸縮装置9は1本の単段式シリンダ11
と第1索条12及び第2索条13とより構成さ
れ、シリンダ11のピストンロツド14の先端は
外筒6の基端部にバレル15の先端は中筒7の基
端部にそれぞれ固着されている。シリンダ11の
バレルの基端部には支持材16を介して2個の第
1案内車17が回転自在に枢着され、中筒7の基
端部には2個の第2案内車18が回転自在に枢着
されている。第1索条12は一端が操作手段19
に止着20され、内筒8の内部において一方の第
1案内車17を懸回して、内筒8の基部に固着さ
れた固定部材21の溝部21aを懸回し、さらに
他方の第1案内車17を懸回して、他端が操作手
段19に止着20され、講部21aの懸回部は移
動することなく固定部材21に止着22されてい
る。第2索条13は一端が固定部材21に止着2
3され、外筒6と中筒7との間において一方の第
2案内車18を懸回して保持手段、24の講部2
4aを懸回し、さらに他方の第2案内車18を懸
回して、他端が固定部材21に止着23され、講
部24aの懸回部は移動することなく保持手段2
4に止着25されている。 The boom telescoping device 9 has one single stage cylinder 11
The piston rod 14 of the cylinder 11 is fixed to the proximal end of the outer cylinder 6, and the barrel 15 is fixed to the proximal end of the inner cylinder 7. There is. Two first guide wheels 17 are rotatably attached to the base end of the barrel of the cylinder 11 via a support member 16, and two second guide wheels 18 are rotatably attached to the base end of the middle cylinder 7. It is rotatably pivoted. The first cable 12 has one end connected to the operating means 19
One first guide wheel 17 is suspended inside the inner cylinder 8, the groove 21a of the fixing member 21 fixed to the base of the inner cylinder 8 is suspended, and the other first guide wheel is 17 is suspended, and the other end is fastened 20 to the operating means 19, and the suspended portion of the main part 21a is fastened 22 to a fixed member 21 without moving. One end of the second cable 13 is fixed to the fixed member 21 2
3, one of the second guide wheels 18 is suspended between the outer cylinder 6 and the inner cylinder 7, and the retaining means 24 has a rear part 2.
4a is suspended, and further the other second guide wheel 18 is suspended, and the other end is fixed 23 to the fixing member 21, and the suspension part of the rear part 24a is fixed to the holding means 2 without moving.
It is fastened 25 to 4.
操作手段19は外筒6の基部若しくは中筒7の
基部のいずれか一方にに選択的に係合固定可能な
もので、第1索条12が止着20されたクリツプ
26に係合杆27が索条の張力調節自在にネジ接
合され、係合杆27の先端部には係合ピン(係合
手段)28が挿通自在な環状部29が形成されて
いる。一方、外筒6の基部には係合杆27が挿通
自在な開口30の上下縁部に係合片31が外側に
突出して固着され、係合片31には係合ピン28
が挿通自在な係合孔32が穿設され、両合片31
間に環状部29を挿入した状態で係合ピン28を
嵌挿し、第1索条12を外筒6に係合固定する。
さらに係合片31は操作席5に臨むように設けら
れている。また中筒7の基部には第1索条12が
貫通したストツパ33が固着され、ストツパ33
に係合杆27が当接して、第1索条12が中筒7
に係合固定される。 The operating means 19 can be selectively engaged and fixed to either the base of the outer cylinder 6 or the base of the inner cylinder 7, and the engaging rod 27 is connected to the clip 26 to which the first cable 12 is fixed 20. are screwed together so that the tension of the cable can be freely adjusted, and an annular portion 29 is formed at the tip of the engagement rod 27 into which an engagement pin (engagement means) 28 can be inserted. On the other hand, at the base of the outer cylinder 6, an engagement piece 31 is fixed to the upper and lower edges of an opening 30 through which the engagement rod 27 can be freely inserted.
An engagement hole 32 is formed through which the mating piece 31 can be freely inserted.
With the annular portion 29 inserted therebetween, the engagement pin 28 is inserted and the first cable 12 is engaged and fixed to the outer cylinder 6.
Furthermore, the engagement piece 31 is provided so as to face the operator seat 5. Further, a stopper 33 through which the first cable 12 passes is fixed to the base of the middle cylinder 7.
The engaging rod 27 comes into contact with the first cable 12 and the middle tube 7
is engaged and fixed.
保持手段24は外筒6の先端部若しくは中筒7
の先端部のいずれか一方に選択的に係合固定可能
なもので、講部24aより前方に突出板34の先
端部に係合ピン28が挿通自在な開口部35が形
成されると共に、突出板34の中央部外面には支
持板36が固着されている。一方、外筒6の先端
部にはストツパ37がやや前方に突出して固着さ
れ、ストツパ37に該ストツパ37の先端状に合
致した支持板36の後端面が当接して、第2索条
13が外筒6係合固定される。また中筒7の先端
部には突出板34が挿通自在な間隙38を存して
係合板39が固着され、係合板39には係合ピン
28が挿通自在な係合孔40が穿設され、突出板
34を間隙38に挿入した状態で係合ピン28を
嵌挿し、第2索条13を中筒7に係合固定する。 The holding means 24 is attached to the tip of the outer cylinder 6 or the middle cylinder 7.
An opening 35 through which the engagement pin 28 can be freely inserted is formed in the tip of the protruding plate 34 forward of the base portion 24a, and the protruding A support plate 36 is fixed to the outer surface of the central portion of the plate 34. On the other hand, a stopper 37 is fixed to the tip of the outer cylinder 6 so as to protrude slightly forward, and the rear end surface of the support plate 36 that matches the tip of the stopper 37 comes into contact with the stopper 37, so that the second cable 13 The outer cylinder 6 is engaged and fixed. Further, an engagement plate 39 is fixed to the tip of the middle cylinder 7 with a gap 38 through which the protruding plate 34 can be inserted, and an engagement hole 40 through which the engagement pin 28 can be inserted is bored in the engagement plate 39. With the protrusion plate 34 inserted into the gap 38, the engagement pin 28 is inserted and the second cable 13 is engaged and fixed to the middle tube 7.
41はクレーン4にワイヤ42を介して吊下さ
れる吊上具である。 Reference numeral 41 denotes a lifting tool suspended from the crane 4 via a wire 42.
尚、係合ピン28は1個設けられているのみで
あつて、操作手段19を外筒6に係合固定する
か、又は保持手段24を中筒7に係合固定するか
いずれかである。 Note that only one engagement pin 28 is provided, and either the operating means 19 is engaged and fixed to the outer cylinder 6, or the holding means 24 is engaged and fixed to the inner cylinder 7. .
次に作用について説明すると、第2図に示すよ
うに、中筒7及び内筒8をそれぞれ外筒6及び中
筒7に没入した状態において、操作手段19の環
状部29は係合片31間に挿入されて操作席5に
臨み、保持手段24の突出板34は間隙38に挿
入されている。この状態より中筒7及び内筒8を
それぞれ外筒6及び中筒7より出没させる場合
は、係合ピン28を上方係合片31の係合孔32
より環状部29を経て下方係合片31の係合孔3
2へ嵌挿して、操作手段19を外筒6に固定する
一方、保持手段24は中筒7との係合が解徐さ
れ、支持板36とストツパ37とが当接して外筒
6に係合固定されている。続いて、シリンダ11
を伸長すると、第5図に示すように、中筒7が外
筒6より突出移動すると同時に、第1索条12が
外筒6基端側に引張され、中筒8が内筒7より突
出移動する。この内筒8の移動に伴つて第2索条
13が中筒7の先端側に引張され、保持手段24
は支持板36とストツパ37とが当接して外筒6
と係合した状態を維持する。また、シリンダ11
を収縮すると、第2索条13が中筒7の外筒6へ
の没入に伴つて外筒6の先端側へ引張され、内筒
8が中筒7内に没入移動し、中筒7が外筒6に完
全に没入すると、突出板34が間隙38に再び挿
入される。 Next, the operation will be explained. As shown in FIG. The protruding plate 34 of the holding means 24 is inserted into the gap 38 so as to face the operator seat 5. In this state, when the middle cylinder 7 and the inner cylinder 8 are moved out and out of the outer cylinder 6 and the middle cylinder 7, respectively, the engagement pin 28 is inserted into the engagement hole 32 of the upper engagement piece 31.
The engagement hole 3 of the lower engagement piece 31 passes through the annular portion 29.
2 to fix the operating means 19 to the outer cylinder 6, while the holding means 24 is disengaged from the inner cylinder 7, and the support plate 36 and the stopper 37 come into contact with each other to engage the outer cylinder 6. Fixed. Next, cylinder 11
When extended, as shown in FIG. 5, the middle tube 7 moves to protrude from the outer tube 6, and at the same time, the first cable 12 is pulled toward the proximal end of the outer tube 6, causing the middle tube 8 to protrude from the inner tube 7. Moving. With this movement of the inner cylinder 8, the second cable 13 is pulled toward the distal end side of the inner cylinder 7, and the holding means 24
When the support plate 36 and the stopper 37 come into contact with each other, the outer cylinder 6
remain engaged. Also, cylinder 11
When contracted, the second cable 13 is pulled toward the tip of the outer cylinder 6 as the middle cylinder 7 is retracted into the outer cylinder 6, the inner cylinder 8 is retracted into the middle cylinder 7, and the middle cylinder 7 is moved. When completely immersed in the outer cylinder 6, the protruding plate 34 is reinserted into the gap 38.
次に、中筒7を内筒8が中筒7内に没入した状
態で外筒6より出没させる場合は、操作手段19
を外筒6に固定している係合ピン28を拔き取
り、外筒6との係合を解除する一方、その拔き取
つた係合ピン28を係合板39の係合孔40より
開口部35を経て中筒7に嵌挿して、保持手段2
4を中筒7に固定する。続いて、シリンダ11を
伸長すると、第6図に示すように、中筒7が外筒
6より突出移動すると共に、中筒7に固定された
ストツパ33に当接する操作手段19は中筒7と
共に移動し、第1索条12及び第2索条13は共
に引張されることがなく、内筒8は中筒7に没入
固定された状態で中筒7と共に外筒6より突出移
動する。この状態において、クレーン4を先端下
りに回動した際もしくはウインチなどによる前引
き操作を行つた際、内筒8が中筒7より突出しよ
うとするが、係合ピン28が中筒7に突出板34
を保持すると共に、内筒8をも中筒7に固定して
いるので、内筒8は中筒7に没入した状態を維持
して内筒8の自走が防止される。また、シリンダ
11を収縮すると、中筒7は内筒8と共に外筒6
内に没入し、完全に没入すると、環状部29が係
止片31間に再び挿入される。 Next, when the middle cylinder 7 is to be made to protrude and retract from the outer cylinder 6 with the inner cylinder 8 recessed into the middle cylinder 7, the operating means 19
While removing the engagement pin 28 that fixes it to the outer cylinder 6 and releasing the engagement with the outer cylinder 6, the removed engagement pin 28 is opened from the engagement hole 40 of the engagement plate 39. The holding means 2 is inserted into the middle cylinder 7 through the part 35.
4 is fixed to the middle cylinder 7. Subsequently, when the cylinder 11 is extended, the middle cylinder 7 moves to protrude from the outer cylinder 6, as shown in FIG. Both the first cable 12 and the second cable 13 are not pulled, and the inner cylinder 8 moves to protrude from the outer cylinder 6 together with the middle cylinder 7 while being immersed and fixed in the middle cylinder 7. In this state, when the crane 4 is rotated downward from the tip or is pulled forward by a winch or the like, the inner cylinder 8 tries to protrude from the middle cylinder 7, but the engagement pin 28 protrudes into the middle cylinder 7. Board 34
Since the inner cylinder 8 is also fixed to the middle cylinder 7, the inner cylinder 8 maintains a recessed state in the middle cylinder 7, and the inner cylinder 8 is prevented from moving on its own. Furthermore, when the cylinder 11 is contracted, the inner cylinder 7 and the outer cylinder 6 are moved together with the inner cylinder 8.
When completely retracted, the annular portion 29 is inserted between the locking pieces 31 again.
尚、本実施例において、シリンダ11はピスト
ンロツド14を外筒6に、バレル15を中筒7に
それぞれ固着したが、逆に、バレル15を外筒6
に、ピストンロツド14を中筒7にそれぞれ固着
してもよく、その際ピストンロツド14と中筒7
とを固着すべく内筒8の一部に長手方向に長孔を
穿設し、そのピストンロツド14の先端に第1案
内車17を設ける。更に、本実施例において、第
1案内車17はシリンダ11のバレル15の基端
部に支持材16を介して枢着したが、直接中筒7
の先端部に設けてもよい。また、第1及び第2索
条12,13はそれぞれ1本の索条を中央にて折
り返して設けたが、それぞれ2本の索条或いは強
度の大なる1本の索条の一端を内筒8の基部に、
他端を操作手段19及び保持手段24にそれぞれ
止着してもよい。 In this embodiment, the piston rod 14 of the cylinder 11 was fixed to the outer cylinder 6, and the barrel 15 was fixed to the inner cylinder 7, but conversely, the barrel 15 was fixed to the outer cylinder 6.
Alternatively, the piston rod 14 may be fixed to the middle cylinder 7, respectively, and in this case, the piston rod 14 and the middle cylinder 7
A long hole is formed in a part of the inner cylinder 8 in the longitudinal direction to fix the piston rod 14, and a first guide wheel 17 is provided at the tip of the piston rod 14. Furthermore, in this embodiment, the first guide wheel 17 is pivotally connected to the base end of the barrel 15 of the cylinder 11 via the support member 16, but it is directly attached to the middle cylinder 7.
It may be provided at the tip of the In addition, the first and second cables 12 and 13 were each provided by folding one cable at the center, but each had two cables or one end of a stronger cable in the inner tube. At the base of 8,
The other end may be fixed to the operating means 19 and the holding means 24, respectively.
以上のように本発明クレーン車のブーム伸縮荘
置によれば、1本の単段式シリンダと2本の索条
とを設け、一方の索条を操作手段に、他の索条を
保持手段に止着し、該操作手段を外筒若しくは中
筒の基部に、保持手段を外筒若しくは中筒の先端
部により選択的に係合し、かつ係合手段は操作手
段又は保持手段のいずれかに係合されるようにし
たために、中筒及び内筒をそれぞれ外筒及び中筒
より同時に出没させる一方、内筒が没入した状態
で中筒を外筒より出没させることができ作業範囲
を拡大することができ、また、係合手段は操作手
段又は保持手段のいずれか一方のみを係合固定す
るので、誤操作を確実に防止することができ、ま
た係合手段の操作は筒の基端または先端で行なわ
れ、係合の位置合わせが容易であり、作業を安全
かつ簡単に行うことができる。更に、小さなシリ
ンダ出力でもつて操作することができるので、ク
レーンの全体重量が軽くなる。 As described above, according to the telescopic boom installation for a crane vehicle of the present invention, one single-stage cylinder and two cables are provided, one cable is used as an operating means, and the other cable is used as a holding means. the operating means is selectively engaged with the base of the outer cylinder or the middle cylinder, and the holding means is selectively engaged with the tip of the outer cylinder or the middle cylinder, and the engaging means is either the operating means or the holding means. Since the inner cylinder is engaged with the inner cylinder, the inner cylinder can be moved in and out of the outer cylinder and the inner cylinder at the same time, and the inner cylinder can be moved in and out of the outer cylinder while the inner cylinder is retracted, expanding the work range. In addition, since the engaging means engages and fixes only either the operating means or the holding means, erroneous operation can be reliably prevented, and the engaging means can be operated at the base end of the cylinder or This is done at the tip, making it easy to align the engagement and making the work safe and easy. Furthermore, since the crane can be operated with a small cylinder power, the overall weight of the crane is reduced.
図面は本発明の実施態様を例示し、第1図はク
レーン車の側面図、第2図はクレーンの断面側面
図、第3図は操作手段と外筒との係合時を示す同
一部背面図、第4図は保持手段と中筒との係合時
を示す要部の平面図、第5図は中筒及び内筒を共
に突出させた場合を示すクレーンの概略側面図、
第6図は中筒のみを突出させた場合を示す同概略
側面図である。
1……クレーン車、2……車台、4……クレー
ン、6……外筒、7……中筒、8……内筒、9…
…ブーム伸縮装置、11……単段式シリンダ、1
2……第1索条、13……第2索条、17……第
1案内車、18……第2案内車、19……操作手
段、20,22,23,25……止着、24……
保持手段、28……係合ピン、31……係合片、
33,37……ストツパ、39……係合板。
The drawings illustrate embodiments of the present invention, and FIG. 1 is a side view of a crane vehicle, FIG. 2 is a cross-sectional side view of the crane, and FIG. 3 is a rear view of the same part showing when the operating means and the outer cylinder are engaged. 4 is a plan view of the main part showing when the holding means and the middle cylinder are engaged, and FIG. 5 is a schematic side view of the crane showing the case where both the middle cylinder and the inner cylinder are protruded.
FIG. 6 is a schematic side view of the same, showing a case where only the middle cylinder is protruded. 1... Crane truck, 2... Chassis, 4... Crane, 6... Outer cylinder, 7... Middle cylinder, 8... Inner cylinder, 9...
...Boom telescoping device, 11...Single stage cylinder, 1
2... first cable, 13... second cable, 17... first guide car, 18... second guide car, 19... operating means, 20, 22, 23, 25... anchoring, 24...
Holding means, 28... engagement pin, 31... engagement piece,
33, 37... Stopper, 39... Engagement plate.
Claims (1)
摺動自在に挿入されてなるクレーンの前記外筒、
中筒間にシリンダが配設されると共に、前記中筒
の先端部及び基端部には案内車が枢着され、前記
内筒の基端部には2本の索条がそれぞげの一端に
て止着され、一方の索条は前記中筒先端側の案内
車を懸回して他端が操作手段に、他方の索条は前
記中筒基端側の案内車を懸回して他端が保持手段
にそれぞれ止着され、前記操作手段は前記外筒の
外方基部に係合手段を介して若しくは中筒の基部
に係合可能に設けられ、前記保持手段は中筒の外
方先端部に内筒とともにに係合手段を介して若し
くは前記外筒の先端部に係合可能に設けられ、前
記係合手段は操作手段の又は保持手段のいずれか
一方に選択的に係合することを特徴とするクレー
ン車のブーム伸縮装置。 2 係合手段は1本の係合ピンであつて、操作手
段を外筒の基部に装設されたホルダに係脱自在に
固定する一方、保持手段を中筒の先端部に係脱自
在に固定する特許請求の範囲第1項記載のクレー
ンのブーム伸縮装置。[Scope of Claims] 1. The outer cylinder of the crane, in which a middle cylinder is slidably inserted into the outer cylinder, and an inner cylinder is slidably inserted into the middle cylinder.
A cylinder is disposed between the middle cylinders, a guide wheel is pivotally attached to the distal end and the base end of the middle cylinder, and two cables are respectively attached to the base end of the inner cylinder. One end of the cable is attached to the guide wheel on the distal end side of the middle cylinder, and the other end is connected to the operating means, and the other cable is attached to the guide wheel on the proximal end of the middle cylinder. The ends thereof are respectively fixed to holding means, the operating means is provided so as to be engageable with the outer base of the outer cylinder via an engaging means or the base of the middle cylinder, and the holding means is provided with the outer base of the outer cylinder so as to be engageable with the base of the middle cylinder. It is provided at the distal end so as to be engageable with the inner cylinder through an engaging means or with the distal end of the outer cylinder, and the engaging means selectively engages either the operating means or the holding means. A boom extension and retraction device for a crane truck, characterized by: 2. The engaging means is a single engaging pin, and the operating means is removably fixed to a holder installed at the base of the outer cylinder, while the holding means is removably connected to the tip of the inner cylinder. A crane boom extension/retraction device according to claim 1, which is fixed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12513579A JPS5648396A (en) | 1979-09-27 | 1979-09-27 | Expansion device for boom of crane car |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12513579A JPS5648396A (en) | 1979-09-27 | 1979-09-27 | Expansion device for boom of crane car |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5648396A JPS5648396A (en) | 1981-05-01 |
JPS6119557B2 true JPS6119557B2 (en) | 1986-05-17 |
Family
ID=14902717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12513579A Granted JPS5648396A (en) | 1979-09-27 | 1979-09-27 | Expansion device for boom of crane car |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5648396A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5892290U (en) * | 1981-12-15 | 1983-06-22 | 株式会社多田野鉄工所 | Telescopic boom crane |
-
1979
- 1979-09-27 JP JP12513579A patent/JPS5648396A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5648396A (en) | 1981-05-01 |
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